Bubble Sort

Bubble Sort
	from __future__ import print_function
	def bubble_sort(collection):
	"""Pure implementation of bubble sort algorithm in Python
	:param collection: some mutable ordered collection with heterogeneous
	comparable items inside
	:return: the same collection ordered by ascending
	Examples:
	>>> bubble_sort([0, 5, 3, 2, 2])
	[0, 2, 2, 3, 5]
	>>> bubble_sort([])
	[]
	>>> bubble_sort([-2, -5, -45])
	[-45, -5, -2]
	>>> bubble_sort([-23,0,6,-4,34])
	[-23,-4,0,6,34]
	"""
	length = len(collection)
	for i in range(length-1):
	swapped = False
	for j in range(length-1-i):
	if collection[j] > collection[j+1]:
	swapped = True
	collection[j], collection[j+1] = collection[j+1], collection[j]
	if not swapped: break # Stop iteration if the collection is sorted.
	return collection
	if __name__ == '__main__':
	try:
	raw_input # Python 2
	except NameError:
	raw_input = input # Python 3
	user_input = raw_input('Enter numbers separated by a comma:').strip()
	unsorted = [int(item) for item in user_input.split(',')]
	print(*bubble_sort(unsorted), sep=',')